Electric cartridge-fuse.



F. W. A. SCHNEIDER.

ELECTRIC CARTRIDGE FUSE. I APPLICATION FILED JUNE 6, 1911.

1 01 6 ,646; Y Patented Feb. 6,1912.

FREDERICK WILLIAM AUGUST SCHNEIDER, OF TORONTO, ONTARIO, CANADA.

ELECTRIC CARTRIDGE-FUSE.

Specification of Letters Patent. I

Application filed June 6, 1911; Serial No. 631,601.

T0 all whom it mag concern: p

Be it known that I, FREDERICK WILLIAM AUGUST SCHNEIDER, of the city of Toronto in the county of York, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Electric Cartridge-Fuses, of which the following is the specification.

My invention relates to improvements in electric cartridge fuses, and the object of the'invention is .to devise a form of fuse of this class, which should the fuse be burned out it may be replaced with facility without destroying the cartridge itself and'also obviate the expense of buying complete new cartridge fuses. Y

A further object is to make the fuse readily separable, so that it can be easily inspected.

My invention consists of a cartridge fuse comprising the cylindrical shell having end notches, end caps for the same provided with end slots opposite the notches in the cartridge and a grooved plug at each end fitted into the end of the cartridge opposite the notch, the fuse fitting at each end into the groove of the plug, and a retaining block provided with a groove to fit'the end of the fuse opposite the groove in the plug and designed to fit into the end slot of the cap and end notch of the cartridge proper and be held therein by a screw the parts being otherwise constructed and arranged in detail as hereinafter more particularly explained.

Figure 1, is a perspective view showing my improved artridge fuse; Fig. 2, is a longitudinal section through the cartridge. Fig. 3, is a cross "section through the cartridge and end cap. Fig. 4, is a perspective detail looking at the outer end of the cap. Fig. 5, is a view of'the end cap looking at it from the inside. Fig. 6, is a per: spective detail of the retaining block. Fig. 7, is a view of the cylindrical portion of the cartridge. v

In the drawings like letters of reference indicate corresponding parts in each figl'lre.

A isa cartridge fuse of which A is the shell or cylindrical portion of the cartridge, which is made in the usual manner of noninsulating material, such as red fiber, and

is. Brovided with end notches A are the end caps, the cylindrical portion of which fits over-the cylindrical portion of the ends of the shell A.

.C are plugsfitt-ing within the shell A at the end and abutting the ends of the end caps. The plugs are provided with grooves C.

D' s the fuse, which is made as usual of leader other suitable material and is pro- Patented Feb. 6, 1 912.

vided with end collars D preferably of comparatively harder metal than the fuse proper D, such as brass. The'ends of the collars D of the fuse D extend through the rounded lowerend of the slot 13 formed at the endof'the caps B.

i .E are detachable plugs provided with end lips E, whereby they may bereadily removed. The plugs E are provided with a groove E? at the lower side which closely fits the upper end of the collar D at the end of the fuse D being of the same are as the collar. I provide set screws F for holding the detachable plugs E 'in position against the collar, so asto insure a perfectcontact between the end of the fuse andthc cap.

It will be noticed that the lip E extends up through the top edge of the.sl.ot B. The face caps B are shown in Fig. 1 provided with knife ends B which are used, of

course, in some instances wherethemain circuit wires extend to jaws in which the.

knife form of connection is used. In many types of cartridge fuses the knife'ends B are not utilized, especially in the smaller type of electric cartridge fuses.

Gris a filling of asbestos fiberor other suitable. material extending' around the fuse D and-filling the cartridge between the plugs. I

Having .now d'escribed'the principal parts involved in my invention Iishall briefly de scribe its operation and utility. Should the fuse be burned and it is desired to substitute a'new fuse all 1t 1s necessaryto do 15 unloosen the set screws F and withdraw-the detachable plugs E and pour out the filling G and remove the fuse and substitute an other one in its place. The plug E is then placed back in position and the set screws JF tightened up again.

'Itwill, of course, be necessaryto loosen one end plug'E and remove the other in order to insure the removal of-the fuse. It will also be readily seen that if it should be desired to inspect-my cartridge fusethis' may be done with facility by removing one of the end plugs and loosening the other and cap and pouring out the contents G.

What I claim as my invention is:

1. The combination-with the non'conducting shell having having end slots, of plugs in the caps provided with a groove, a fuse having ends fitting in the grooves in the plugs, and de tachable plugs provided with a grooved side to fit against the ends of the fuses and means for holding the detachable plugs in place as and for the purpose specified.

3. The combination with the non-conducting shell having end notches and the caps five cents each, by addressing Gommtssione': of Washington, '9.

having end slots, vided with a groove, a fuse having ends titting in the grooves in the plugs, and detachable plugs provided with a grooved side to fit against the ends oi" the fuse, and end lips projecting beyond capu and means for holding the detachable plugs in place, as and for the purpose specified.

i The combination with the non-conduct ing shell having end notches and the caps having end slots, of plugs in the cap provided with a groove, a fuse having ends fitting in the grooves taehable plugs provided with a grooved side to fit against the ends of the fuse, and end lips projecting beyond the wall of the cap, and set screws for holding the detachable plugs in place as specified. I

FREDERICK WlliLlAll AUGUST SOHNEEBER. Witnesses B. Bow,

Psne'rort. I

Patents,

of plugs in the cap pro-- the wall of thein the plugs, and de- 

